#pragma once
#include "gpMath.h"
#include "gpError.h"

class gp_Pnt;
class gp_Dir;
class gp_Ax1;
class gp_Ax2;
class gp_Pnt2d;
class gp_Dir2d;
class gp_Ax2d;
class gp_XYZ;
class gp_Mat;
class gp_Quaternion;
class gp_Trsf;
class gp_GTrsf;
class gp_Pnt;
class gp_Vec;
class gp_Dir;
class gp_Ax1;
class gp_Ax2;
class gp_Ax3;
class gp_Lin;
class gp_Circ;
class gp_Elips;
class gp_Hypr;
class gp_Parab;
class gp_Pln;
class gp_Cylinder;
class gp_Sphere;
class gp_Torus;
class gp_Cone;
class gp_XY;
class gp_Mat2d;
class gp_Trsf2d;
class gp_GTrsf2d;
class gp_Pnt2d;
class gp_Vec2d;
class gp_Dir2d;
class gp_Ax2d;
class gp_Ax22d;
class gp_Lin2d;
class gp_Circ2d;
class gp_Elips2d;
class gp_Hypr2d;
class gp_Parab2d;

//!  The geometric processor package, called gp, provides an <br>
//!  implementation of entities used  : <br>
//!  . for algebraic calculation such as "XYZ" coordinates, "Mat" <br>
//!    matrix <br>
//!  . for basis analytic geometry such as Transformations, point, <br>
//!    vector, line, plane, axis placement, conics, and elementary <br>
//!    surfaces. <br>
//!  These entities are defined in 2d and 3d space. <br>
//!  All the classes of this package are non-persistent. <br>
class gp  {

public:
  //! Parabola. <br>//! Method of package gp <br>
//!  In geometric computations, defines the tolerance criterion <br>
//! used to determine when two numbers can be considered equal. <br>
//! Many class functions use this tolerance criterion, for <br>
//! example, to avoid division by zero in geometric <br>
//! computations. In the documentation, tolerance criterion is <br>
//! always referred to as gp::Resolution(). <br>
     static  double Resolution() ;
  //! Identifies a Cartesian point with coordinates X = Y = Z = 0.0.0 <br>
     static const gp_Pnt& Origin() ;
  //! Returns a unit vector with the combination (1,0,0) <br>
     static const gp_Dir& DX() ;
  //! Returns a unit vector with the combination (0,1,0) <br>
     static const gp_Dir& DY() ;
  //! Returns a unit vector with the combination (0,0,1) <br>
     static const gp_Dir& DZ() ;
  //!Identifies an axis where its origin is Origin <br>
//! and its unit vector coordinates  X = 1.0,  Y = Z = 0.0 <br>
     static const gp_Ax1& OX() ;
  //!Identifies an axis where its origin is Origin <br>
//! and its unit vector coordinates Y = 1.0,  X = Z = 0.0 <br>
     static const gp_Ax1& OY() ;
  //!Identifies an axis where its origin is Origin <br>
//! and its unit vector coordinates Z = 1.0,  Y = X = 0.0 <br>
     static const gp_Ax1& OZ() ;
  //!Identifies a coordinate system where its origin is Origin, <br>
//! and its "main Direction" and "X Direction" coordinates <br>
//!  Z = 1.0, X = Y =0.0 and X direction coordinates X = 1.0, Y = Z = 0.0 <br>
     static const gp_Ax2& XOY() ;
  //!Identifies a coordinate system where its origin is Origin, <br>
//! and its "main Direction" and "X Direction" coordinates <br>
//!  Y = 1.0, X = Z =0.0 and X direction coordinates Z = 1.0, X = Y = 0.0 <br>
     static const gp_Ax2& ZOX() ;
  //!Identifies a coordinate system where its origin is Origin, <br>
//! and its "main Direction" and "X Direction" coordinates <br>
//!  X = 1.0, Z = Y =0.0 and X direction coordinates Y = 1.0, X = Z = 0.0 <br>//! In 2D space <br>
     static const gp_Ax2& YOZ() ;
  //! Identifies a Cartesian point with coordinates X = Y = 0.0 <br>
     static const gp_Pnt2d& Origin2d() ;
  //! Returns a unit vector with the combinations (1,0) <br>
     static const gp_Dir2d& DX2d() ;
  //! Returns a unit vector with the combinations (0,1) <br>
     static const gp_Dir2d& DY2d() ;
  //! Identifies an axis where its origin is Origin2d <br>
//! and its unit vector coordinates are: X = 1.0,  Y = 0.0 <br>
     static const gp_Ax2d& OX2d() ;
  //!  Identifies an axis where its origin is Origin2d <br>
//! and its unit vector coordinates are Y = 1.0,  X = 0.0 <br>
     static const gp_Ax2d& OY2d() ;

private:
	friend class gp_XYZ;
	friend class gp_Mat;
	friend class gp_Quaternion;
	friend class gp_Trsf;
	friend class gp_GTrsf;
	friend class gp_Pnt;
	friend class gp_Vec;
	friend class gp_Dir;
	friend class gp_Ax1;
	friend class gp_Ax2;
	friend class gp_Ax3;
	friend class gp_Lin;
	friend class gp_Circ;
	friend class gp_Elips;
	friend class gp_Hypr;
	friend class gp_Parab;
	friend class gp_Pln;
	friend class gp_Cylinder;
	friend class gp_Sphere;
	friend class gp_Torus;
	friend class gp_Cone;
	friend class gp_XY;
	friend class gp_Mat2d;
	friend class gp_Trsf2d;
	friend class gp_GTrsf2d;
	friend class gp_Pnt2d;
	friend class gp_Vec2d;
	friend class gp_Dir2d;
	friend class gp_Ax2d;
	friend class gp_Ax22d;
	friend class gp_Lin2d;
	friend class gp_Circ2d;
	friend class gp_Elips2d;
	friend class gp_Hypr2d;
	friend class gp_Parab2d;
};

